WIESBADEN, Germany (AFX) - German consumer prices were unchanged in September from August and were up 2.1 pct year-on-year, according to preliminary figures released by the Federal Statistics Office. The office added the harmonised index of consumer prices (HICP) also remained unchanged month-on-month, and rose 2.1 pct year-on-year. Final data will be published in mid-October, it said.